Hey I'm bout to get my first oil change since owning my 2006 Monte Carlo lt with the 3.5 engine and was wondering has anyone tried pennzoil ultra platinum pureplus I usually go with Mobil 1 full synthetic but was thinking of trying the pennzoil brand

 

I always have used Mobil 1

 

Should I stick with what the manual calls for 5w30 or since its summer and gets hot in my area 10w30?

 

Chevy Dealer service Dept. should know best for your area

 

I'd run the same viscosity as what the manual says. I'm running conventional Penzoil in my Monte - but it's a slow 3.8 V-6. It's a cruiser/show car and I only put about 1000 miles on it a year.